package org.lq.web.admin;

import org.lq.entity.Tag;
import org.lq.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {
    @Autowired
    private TagService tagService;
    @GetMapping("/tags")
    public String tags(@PageableDefault(size = 5,sort = {"id"}, direction = Sort.Direction.DESC )
                                    Pageable pageable, Model model)
                {
                    model.addAttribute("page", tagService.listTag(pageable));
                    return "admin/tags";
                }
    @GetMapping("/tags/input")
    public String input(Model model){
        model.addAttribute("tag", new Tag());
        return "admin/tags-input";
    }
    @PostMapping("/add_tags")
    public String  post(@Valid Tag tag, BindingResult result, RedirectAttributes attributes){
        if(result.hasErrors()){
            return "admin/tags-input";
        }
        Tag TagByName = tagService.getTagByName(tag.getName());
        if(TagByName!=null){
            result.rejectValue("name","nameError","不能添加名称重复的分类");
            return "admin/tags-input";
        }
        Tag t = tagService.saveTag(tag);
        if(t==null){
            attributes.addFlashAttribute("message","操作失败");
        }else{
            attributes.addFlashAttribute("message","操作成功");
        }
        return "redirect:/admin/tags";
    }
    @GetMapping("/tags/{id}/input")
    public String editInput(@PathVariable Long id, Model model){
         model.addAttribute("tag",tagService.getTagById(id));
        return "admin/tags-input";
    }
    @PostMapping("/update_tags/{id}")
    public String  editPost(@Valid Tag tag, BindingResult result, @PathVariable Long id, RedirectAttributes attributes){
        if(result.hasErrors()){
            return "admin/tags-input";
        }
        Tag TagByName = tagService.getTagByName(tag.getName());
        if(TagByName!=null){
            result.rejectValue("name","nameError","不能添加名称重复的分类");
            return "admin/tags-input";
        }
        Tag t = tagService.updateTag(id,tag);
        if(t==null){
            attributes.addFlashAttribute("message","更新失败");
        }else{
            attributes.addFlashAttribute("message","更新成功");
        }
        return "redirect:admin/tags";
    }
    @GetMapping("tags/{id}/delete")
    public String delete(@PathVariable  Long id,RedirectAttributes attributes){
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message","删除成功");
        return "redirect:admin/tags";
    }

}
